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The oldest known copy of Archimedes’ work lies hidden under the pages of a 13th century prayer book. For years, scientists and scholars tried to decipher what ancient script they could. Now, new technology is allowing them to look past the prayer book to the wealth of knowledge underneath.

The Audubon Aquarium of the Americas re-opened in New Orleans Friday, nine months after Hurricane Katrina killed thousands of fish and animals there. Lance Ripley of the aquarium tells Melissa Block that generous donations rebuilt and revived the facility.

Illegal border crossings are up in the San Diego area, even though a large National Guard contingent is providing support for the U.S. Border Patrol. Experts say beefed-up enforcement in Arizona and New Mexico is pushing illegal crossers toward California.

NPR's Sacha Pfeiffer talks with Jon Levy, professor and chair of the Department of Environmental Health at Boston University School of Public Health, about the thread he wrote about wearing a mask.

A Russian sergeant pleads guilty for killing a Ukrainian civilian in the war's first war crimes case. Such cases usually occur after a war ends. Ukraine wants to prosecute while the evidence is fresh.

President Bush this week is expected to sign a $70 billion tax-cut package into law. It will lower rates for investors and save billions of dollars for families with above-average incomes. Now Republicans in Congress are turning their attention toward the estate tax. They want it repealed permanently.

Syria's ruling Baath Party opened a congress Monday to discuss political and economic reforms. Syria, which has a centrally planned economy, suffers from a high unemployment rate. Economists and businessmen say they have seen positive changes in recent years, but warn that the government must do more to battle corruption and streamline the inefficient state bureaucracy.

Russia has given Ukrainian soldiers in Mariupol a chance to surrender as they close in on the port city. Meanwhile, Russia is intensifying rocket attacks elsewhere in Ukraine.

These young politicians have few memories of life under Soviet rule — and they say the war has accelerated their efforts to push for a more Europe-focused future.

Ukrainian forces have driven Russian attackers out of the city of Kharkiv. Ukraine's second-largest city had been under heavy bombardment for weeks.